Read First: State Change, State Type Classifies state changes. For example, if the state change during divorce can be modelled at the type level, at Person for example, by a state type change between the state types Married and Single. The states before and after a state change type are given by hasPrestateType/isPrestateTypeFor and hasPoststateType/isPoststateTypeFor.
Subtypes: Event Type, State Transition Rule